Furnace for annealing wire



2 Sheets-sheet 1 W. HBWITT.& J. WITHINGTON. .Furnane for Annealing Wire, 8w.

Patent ed April 27, 1880:.

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i 2 'Sheets-Sheet 2. W. HEWITT & J. WITHINGTON.

Furnace for Annealing Wire, &o. No. 226,853.

Patented April 27, 1880.

N. PEIERS. PNOTO-L|TNOGRAPNER. WASHINGTON. D. C.

NITED STATES PATENT OFFI E.

WILLIAM HEWITT AND JAMES WVITHINGTON, OF GHAMBERSBURG, ASSIGN- ORS TO THE TRENTON IRON COMPANY, OF TRENTON, NEW JERSEY.

FURNACE FOR ANNEALING WIRE, 800-.

SPECIFICATION forming part of Letters Patent No. 226,853, dated .April 27, 1880. Application filed J annary 2S, 1850.

To all whom it may concern: placed a fixed iron saucer, and upon this saucer Be it known that we, WILLIAM HEWITT and have been lowered in and rested various forms JAMES VVIIHINGTON, of Ohambersburg, New of removable annealing-pots, while fixed pots Jersey, have invented a new and useful Imhave also been attached thereon. The dif- 5 provement in Furnaces for Annealing Wire ficulty, however, has been to lower in the re and like articles, of which the following is a movable pots in such manner that they shall full and true description, and sufficient to enseat themselves accurately upon their saucer, able those skilled in the art to which our inand, where more than one are used, upon each vention appertains to understand and employ other, and shall not, in their handling, dam- 10 the same, reference being had to the accomage the frame-work of the furnace, its crown- 6o panying drawings, forming part hereof, in plate, the saucer itself, or the pier. To the which above end we have devised What we term pot- Figure 1 is a vertical sectional elevation of standards, extending from saucer to crowna furnace embodying our invention, section plate, and so introduced, both as to number I 5 being taken transversely through the furnace and location, as to insure the accurate entry in adirection at right angles to the grate-bars, and removal of the pot or pots. one of the two annealing-pots being in section. In the practical carrying out of this plan we Fig. 2 is a similar view of the same, taken have found it convenient to provide the pots longitudinally through the furnace in adirecwith lugs, although they are employed for 20 tion parallel with the grate-bars. Fig. 3 is a mere convenience and may be dispensed with top-plan view, section being supposed on the and standards in sufficient number and relaline a a of Fig. 1. Fig. 4 is a top-plan view of tion alone employed. the furnace shown in Fig. 2, the left-hand por- In the following description we set forth the tion being sectional on the line b 0 (Z of said construction of an annealing-furnace adapted 25 Fig. 2; and Fig. 5 is a perspective detail illusfor removable pots.

L trative of the construction of the saucer, pot In the drawings, A is the brick-work of 1 guides or standards, and central draft-flue. a square furnace, longitudinally throughout Similar letters of reference indicate correwhich runs a pier, B, upon which rests a sponding parts. saucer, O. l) is an annular and conical space 3 Our invention relates to furnaces'in which inclosed by the brick-work A, andE F are removable annealing-pots are employed, and the grates on either side of the pier, on which it aims at such construction of these furnaces the fires are made. F is a crown-plate capas will enable the manipulation of the pots ping the brickwork of the furnace, having a with greater ease and certainty than has herecentral circular opening, O,and provided with 35 tofore been possible, and with less damage to a circular seat, in which the furnace-cover G the frame-work of the furnace. rests, and is, when desired, made tight by As is well known, after wire has been drawn luting. The inner edge of the opening 0 to a certain degree it becomes stiff and hard, forms a guard-ring to the brick-work. and requires to be softened or annealed before The saucer O is centrally perforated with it can be further drawn. For certain purposes, an opening, H, to which communication is 0 also, wire, when finished, requires to be anhad with the fires by means of a flue, I, travnealed, and is sold as annealed wire. It is ersing the pier and communicating with the usually covered more or less with a coating grates on either side. of oxide or scale, and is distinguished from L is a side-draft flue, openingin the manner bright wire by its darker color and greater shown through the back wall of the furnace pliability, ductility, and softness. from the conical space thereof, said flue being Heretofore annealing furnaces have been provided with a damper,M, to be opened only constructed in an inclosed brick-work, subwhen the furnace is being charged and unstantially of the form represented in the drawloaded. This flue serves to draw the flame 5o ings, upon the central pierof which has been away from contact with those employed in manipulating the pots,

and is an essential requisite in the operation of a system in which the fires are never allowed to cool.

N is the top flue or ordinary exit for the gases of combustion, which connects with any suitable stack. J J are standards of any fit material, vertically erected between'the saucer and the crown-plate, and rigidly connected with both saucer and crown-plate. Any desired series of these standards may be employed, their object being to constitute, in connection with the saucer and crown-plate, a framework within which removable annealing-pots can be introduced, guided, and held in proper position in the furnace.

The frame-work serves to keep the removable annealing-pots, which are introduced one on the other to the desired number, in proper position, as shown in Figs. 1 and 2, the inner edge or guard-ring of the crown-plate that caps the brick-work protecting the latter in the placing and removal of the pots.

The pots are inclosed cylinders having coincident central tubular passage-ways, which come in line with the opening in the saucer, so that when two or more pots are in place in the furnace they embody a continuous central flame-flue throughout the center of any given'series thereof, the advantages of which arrangement for the effectual and uniform annealing of wire coils are self-evident.

Lugs K projecting from the exterior of the pots fit between the standards and serve to retain the pots in proper relative position.

The lugs, as will be seen by consulting Figs. 1, 2, and 4 of the drawings, enter between the standards, and, sliding between them as though in ways, control accurately the position of the pots as they are vertically raised and lowered.

The advantage of the arrangement is selfevident, as the standards extending from crown-plate to saucer of the furnace afi'ord absolute protection to the same from damage by the pots. i

Having thus described our invention, we claim and desire to secure by Letters Patent of the United States- 1. In an annealing-furnace, the combination, with the saucer or other base-rest for a series of removable annealing-pots, of a series of fixed standards extending from base to crown of furnace, and adapted to guide in the introduction and removal of the pots and to retain them in position in the furnace.

2. The combination, with a furnace provided with a series of standards extending from the saucer or base-rest to the crownplate, of a series of removable annealing-pots, in the manner shown and described.

3. In combination with the pot-standards J of an annealing-furnace, lugs K upon the annealing-pots, in the manner shown and described, and for the purpose specified.

In. testimony whereof we have hereunto signed our names this 20th day of January,

A.D.188(). WM. HEWITT.

JAMES WITHINGTOE.

Witnesses:

J. BONSALL TAYLOR,

W. (J. STRAWBRIDGE. 

